I think I heard that explanation from discussions with some of the old-timers/access pioneers involved with writing ANSI A117.1-1980, UFAS, and the 1984 CBC where the requirement first appeared...
Search Results "Check Writing Surface"
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Re: 404.2.6 Doors in Series and Gates in Series
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4.34.6.4(1)
(1) The counter shall be mounted at a maximum height of 34 in (865 mm) above the floor, measured from the floor to the top of the counter surface, or shall be adjustable or replaceable as...
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R208.1 Where Required
Detectable warning surfaces complying with R305 shall be provided at the following locations on pedestrian access routes and at transit stops: 1....
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Appendix D: Photometric Measurements
that would be reflected from a perfectly diffusely reflecting surface....
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Polypavement
After uncharacteristically heavy rainfall, the surface became the same texture as mud. Upon drying up, the surface remained cracked and was heaving along the full width of the trail....
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Finish and Contrast: ADA Standard Section 703.6.2
Additional factors affecting the ease with which the text can be distinguished from its background include shadows cast by lighting sources, surface glare, and the uniformity of the text...
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Passing Spaces: ADA Standard Section 403.5.3
Section 403.5.3 covers the current ADA Standards for passing spaces that are part of an accessible route.
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11B-703.7.2.7 Pedestrian traffic-control buttons
Control buttons shall be located no higher than 48 inches (1219 mm) above the ground surface adjacent to the pole....
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11B-605.5.4 Toe Clearance
Partition components at toe clearances shall be smooth without sharp edges or abrasive surfaces....
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11B-605.5.4 Toe Clearance
Partition components at toe clearances shall be smooth without sharp edges or abrasive surfaces....
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11B-703.7.2.7 Pedestrian traffic-control buttons
Control buttons shall be located no higher than 48 inches (1219 mm) above the ground surface adjacent to the pole....
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1132A.4 Level floor or landing
Primary entry doors, required exit doors or secondary exterior doors with changes in height between the interior surface or floor level and the exterior surface or floor level shall comply...
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Seat Height
Commenters noted that this specification should be clarified as applying to the height as measured at the top of the seat surface. Response....
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R405.3.3 Minimum Required Depth
Where knee clearance is required under an element as part of a clear space, the knee clearance shall be 280 mm (11 in) deep minimum at 230 mm (9 in) above the finish surface, and 205 mm...
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Illumination Levels (Reserved) [4.30.8]
A level from 10 to 30 footcandles is recommended uniformly over the sign surface....
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Transfer Devices for Use with Amusement Rides: ADA Standard Section 1002.6
Where possible, designers are encouraged to locate the transfer device seat no higher than 17 to 19 inches 430 to 485 mm) above the load and unload surface....
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11B-1002.6 Transfer devices for use with amusement rides
Where possible, designers are encouraged to locate the transfer device seat no higher than 17 to 19 inches (430 to 485 mm) above the load and unload surface....
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11B-1002.6 Transfer devices for use with amusement rides
Where possible, designers are encouraged to locate the transfer device seat no higher than 17 to 19 inches (430 to 485 mm) above the load and unload surface....
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Boat Slips: ADA Standard Section 1003.2.1
Where handrail extensions are provided on gangways or transition plates, the handrail extensions shall not be required to be parallel with the ground or floor surface. 7....
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11B-1003.2.1 Boat slips
The vertical distance is 10 feet (3050 mm) between the elevation where the gangway departs the landside connection and the elevation of the pier surface at the lowest water level....
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11B-1003.2.1 Boat slips
The vertical distance is 10 feet (3050 mm) between the elevation where the gangway departs the landside connection and the elevation of the pier surface at the lowest water level....
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Primary Function
transportation facilities that involve primary functions include, but are not necessarily limited to, ticket purchase and collection areas, passenger waiting areas, train or bus platforms, baggage checking...
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III-7.7000 Alterations
are not required in alterations (§4.1.6(1)(g)). 3) There are special less stringent requirements for alterations in many other areas, including sales and service counters (§7.2(1)), check-out...
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Restaurants and Lounges
With regard to reviewing the bill, handling currency and credit cards, and signing sales slips, restaurant staff should follow the same procedures discussed above in the section entitled “Check-In...